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' NITED STATES- PATENT OrFIcE.

DAVID w. STARKEYpOF APPLETON, WISCONSIN.

, vise;

SPECIFICATION forming part of Letters Patent No; 381,178, dated April 1?, 1888.

Application filed gui 23.1881.

To all whom is may concern:

- Be it known that LDAVID W. STARKEY, a-

pleton, in the county of Ontagamie and State of Wisconsin, have invented certain new and useful Improvements in Vises; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention, suchas will enable others skilled in the'art to which it appertains to make and use the same. My invention consists in-a parallel-jawviseoperated by a screw, an'dso constructed, combined, and arranged in its parts, as will be hereinafter described and specifically claimed, that the movable jaw is readily moved to any desired position without the intervention of the screw, the nut locked to the outer or stationary jaw by means of one or more'cams cut on "the periphery of the screw-shaft and operating upon and forcing outward one or more toothed blocks into engagement with one. or more toothed racks permanently attached to the outer or stationaryjaw,and the grip of the jaw produced; and, when desired, the nut can be readily unlockedby a backward movement of the screw-shaft. I In the accompanying drawings, Figure 1 is I a verticalsection along the axis of a paralleljaw vise of' my improved construction, the screw-shaft, its screw-thread, cams, handle, and rack not being sectioned; Fig. 2 is a horizontal section of a portion of the vise in the axial line of the same. In this View the screwshaft, screw, and spring-pins are not sectioned. Fig. 3 is a transverse section in the line as x of 1 Fig. 1. Fig. 4 is a transverse section in the c and one or more cams, c, on its periphery.

. D is the nut, provided with blocks E, one or both of which are' constructed with teeth 6.

The'stationary part A of the vise is provided with the usual jaw, a, and artail-housing, a, and it is also providedwith one or more toothed racks, a, having ratchet-teeth a, as shown. The racks are suitably embed ded in and secured to the housing a, and are flush with its inner surfaces, as shown.

SerialNo. 215,114. (No model.)

The guide b of the part B of the vise con- 1 tains the nut D, which is of oblong form, and

is fitted into lateral slots b intheguide b, said slots being slightly longer than the nut,in order to allow thesame-longitudinalplay,sufiicient to effect the locking of the nutand the grip-- pingiof the jaws. This nut is'alsoprovided with transverse horizontalslotsd, into which ratchet-toothed blocks E are fitted. The outer facings of the blocks E stand in linewith ratch etracks' a of the stationaryv part A, and its--' ratchet-teeth e, which are similar to the'ratchetteeth a, mesh with said teeth a, and the blocks are moved outward by the cams c, as will be seen. The blocks E are provided with lugs e,whicl1.

are operated upon by the cams c on the periphcry 0 of the screw-shaftC. Wh'en the screwshaft ,0 is turned by means of the vise-handle ratchet-teeth e of the blocks engaging with the racks a cause the blocks to 'become securely interlocked with the t'eetha of the same, and

the nut D being thussecurely locked to the, stationary jaw-A, the threaded portion 0*. of

the sc'r'ew-shaft O, the sliding part B,.and its jaw 'b will be forcedtoward the jaw wand upon the article to be clamped between thesaid j aws by a further turning of the screw-shaft 0.

The blocks E are provided with sockets e in whichs rin sc -and ins 6* are laced said P g P P 7 pins-having an outward bearing against a.

grooved surface, o cut' longitudinallyin the middle of the racks a O-is turned back, so as to 'move the cams out of the way of the blocks. groovesia the pins of are not-"required to slide over ratchet-teeth a of ratchet a, thereby avoiding noise and wear of the pinsand ratchet-teeth. V H In the vise shown in Fig. 5 there is only one ratchet-teeth e, the rack a being embedded in By providing the By these spring-pins the blocks are caused to move out of engageinent with the racks a when the,'screw-shaft V. '95 ratchet-rack, a, andone sliding block, E, with the top portion of the housing a and theblock j E resting against a cam or cams on thetop of the screw-shaft G, the-other parts being con structed as shown, and operated similar to those above described. Inthis construction,

block, E, and it is inserted into the nut D, being caused to bear against the lower surface of the screw and the bottom portion'of the part A of the vise, and serving to prevent thescrew from deviating from its horizontal position when under a strain. This modified construction, being somewhat lighter than the abovedescribed construction, is well adapted for the performance of light work, while the former answers the best for heavier classes of work.

It will be seen from the foregoing specification, first, that while the screw-shaftO isturned back in a manner to move the cams out of the way the blocks are disengaged from the racks a by the action of springs or other cause, and that when this takes place the part B of the vise can be readily moved forward or backward without turning the screw; and, second, by the adjustment just described the jaws a and b can be opened quickly to receive articles to be clamped between them, and then can be, by turning the screw-shaft forward, caused to close upon the article with any desired grip. During the last-named operation the cams moved the blocks outward and caused them to engage with the racks, and this done acontinuation of theturning of the screw-shaft forward produced the locking of the nut and grip of the jaws. V p

In the modification shown in Fig. 5 one cam may be dispensed with; also the spring and pin may be left off and the block allowed to adjust itself out of engagement by its gravity.

What I claim as my invention is-- 1. The parallel jaw-vise provided with one or more locking-racks, a a nut, D, having a forward extension with slots b, toothed blocks E, a shaft with a screw and one or more cams, said shaft having its cams formed directly upon its periphery forward of the nut, and the not having the said toothed blocks set into its oblong slots and sliding back and forth in said slots, substantially as and for the purpose described.

2. In a parallel vise, A B, the combination of the housing a, having one or more racks, a, the screw-shaft 0, having screw-threaded portion 0 and one or more cams formed directly on its periphery and within its greatest diameter and forward of the screw-thread of the nut, the nut D, having slot d, and blocks having lugs 6', provided with teeth, substantially as and for the purpose described.

3. In the described parallel "ise, the blocks E, having spring 6 and pin e, in combination with the rack a, having groove a, and operatingscrew-shaft O, substantially as and for the purpose described.

4. In combination, a parallel jaw vise operated bya screw and constructed and arranged in the parts,substantially as describedto wit, having a movable jaw which is readily moved to any desired position without the inter-vention of the screw, acombined nut and case, D, holding the toothed blocks E, which, by the intervention of the cams, can be locked to the outer or stationary jaw, a cam or cams formed on the periphery of the screw-shaft contiguous to the screw-threaded portion of said shaft, one or more toothed blocks containing disengaging pins or studs 0, movable outward radially by said cams, and a rack bar or bars, all for the purpose described.

In testimony whereof I aflix my signature in presence of two witnesses.

DAVID W. STARKEY.

Witnesses:

CHARLES F. TOTMAN, H. F. STONE. 

